Magnetic ore-separator.



No. 784,502 PATENTED MAR. v, 1905.

L. G. ROWAND.

MAGNETIC} ORE SEPARATOR.

APPLICATION FILED FEB. 2 s, 1898.

2 SHEETS-SHEET 1.

Attorney;

No. 784,502. PATENTED MAR. 7, 1905. L. G. ROWAND.

MAGNETIG ORE SEPARATOR.

APPLIGATION FILED FEB. 2B, 1298.

2 SHEETS-SHEET 2.

""llllllll! W- jento Attorneys NiTEn STATES Patented Maren 7, 1905.

PATENT FFICE.

LEWIS G. ROVVAND, OF CAMDEN, NEWV JERSEY, ASSIGNOR TO WETH- ERILL SEPARATING COMPANY, A CORPORATION OF NEW JERSEY.

MAGNETIC ORE-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 784,502, dated March 7, 1905.

Application filed February 28, 1898. Serial No. 671,937- I To all whom it may concern.-

Be it known that I, LEWIS G. ROWAND, a citizen of the United States, residing at Camden, county of Camden, and State of New Jersey, have invented a new and useful Improvement in Magnetic Ore- Separators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to certain improvements in that class of ore-separators in which the ore to be separated is in a finely-divided condition conveyed from the hopper by a conveyor-belt into the magnetic field of a magnet or series of magnets. In this magnetic field and at right angles to the conveyor belt is a secondary or discharging belt, against which when the conveyer-belt brings the ma terial within the magnetic field by reason of the magnetic force the magnetic material is lifted, the non-magnetic material being carried by the conveyer-belt beyond the magnetic field. The material lifted from the conveyer-belt to the discharging-belt is held upon or against the discharging-belt by the magnetic force until it (the discharging-belt) passes beyond, the magnetic field, when the lifted material drops off. In the ordinary construction the magnetic field is entirely above the conveyor and discharging belts, the magnetic lines passing from pole-piece to pole-piece above the belt. In consequence of this arrangement the ore is not subjected to the maximum magnetism.

Speaking generally, in my improvement the lines of magnetic force are caused to pass directly through the conveyerbelt, so that the ore is subjected to the maximum magnetism. The conveyer-belt is placed nearer to one of the pole-pieces than the other, so that the magnetic field of the magnet which it is placed in closer proximity to is the stronger, and a discharging-belt is placed between the conveyer-belt and said pole-piece, so that the magnetic ore in the ore subjected to the maximum magnetism will be drawn to the discharging-belt and a cleaner separation of the magnetic material will take place.

My invention, may also be used without the discharging-belt, although its use forms the preferred form of embodiment of my invention and the one illustrated in the accompanying drawings.

My invention also consists of certain details of construction to be more fully hereinafter described.

In the drawings, Figure 1 is a plan view. Fig. 2 is a section on the line 2 2 of Fig. I. Fig. 3 is a section on the line 3 3 of Fig. 1.

4 is a similar view with additional devices.

A A are the main conveyer-belt rollers, driven by any proper means, and A is the conveyerbelt.

B is the hopper, having the funnel-shaped mouth B.

B is the feed-roller, driven by a belt B from the shaft of the driving-roller A, and B is a spout connecting the mouth of the hopper B with the conveyer-belt A C C are two magnets, one above and the other below the conveyor-belt. In place of one magnet above and one below the 0011- veyer-belt a plurality of magnets above and below may be used.

D D are the pole-pieces of magnet C, and E E the pole-pieces of magnet C. As may be seen, the pole-pieces D and E are in proximity to each other, with the conveyor-belt between them, and the same with pole-pieces D and E, so that the magnetic lines of force pass, say, from pole-piece E through conveyor-belt to pole-piece D and from. polepiece E through conveyer-belt to pole-piece D. The magnetic force of magnet C is greater than that of magnet C. By this it may be seen that the magnetic lines of force pass directly through the conveyer-belt and the ore on the belt is subjected to the maximum magnetism. Further, the magnetic field of magnet C being stronger the magnetic ore will be drawn toward said pole-pieces D and D.

Interposed between the conveyer-belt A and the pole-pieces D and D are the discharge-belts F and E, which pass over the rollers ff, said discharge-belts being at an angle to the conveyer-belt A The polepieces D D and E E are tapered, as shown, and extend tapering along the discharge-belts F and F, respectively, so that as the magnetic ore is carried along by the dischargebelts the magnetic field decreases.

The ore carried alon the conveyer-belt A enters the magnetic fie d of the pole-pieces D and E, and the magnetic ore is drawn against the discharging-belt F. The ore still on the conveyer-belt passes into the magnetic field of the pole-pieces D E, and any magnetic ore still remaining will be drawn against the dischar ing-belt F. The ore on the belts F F wil fall into proper receptacles at the point L.

In order to prevent any ore dropping from the dischar ing-belts beyond the conveyerbelt, but still within the magnetic field, from being drawn against the pole-pieces E or E, I interpose between the pole-pieces E and E and the conveyer-belt and discharging-belts and parallel with the latter belts G, as

shown in Fig. 4. Any ore dropping from the discharging-belts beyond the conveyer-belt will be caught by the belts G, and the ore still remaining upon the discharging-belt will drop into proper receptacles at the point L.

Having now fully described my invention, what I claim, and desire to protect by Letters Patent, is

1. In a magnetic ore-separator, the combination of a conveyer-belt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the conveyer-belt, the upper magnet having the stron er magnetic field.

2-. In a magnetic ore-separator, the combination of a conveyer-belt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity, with the conveyer-belt interposed, the belt being in closer proximity to the ole-pieces of the upper magnet than the po e-pieces of the lower magnet.

3. In a magnetic ore-separator, the combination of a conveyer-belt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the conveyer belt, the upper magnet having the stronger magnetic field, and a dischargingbelt passing over and beyond and at an angle with the conveyer-belt, said discharging-belt being interposed between the conveyer-belt and the upper magnet.

4. In a magnetic ore-separator, the combination of a convever-belt adapted to convey the material to be treated, of magnets above.

and below said belt, the pole-pieces of opposite magnets being in proximity to the conveyer-belt, and a discharging-belt passing over and beyond and at an angle with the conveyer-belt, said discharging-belt being in- I being interposed between the conveyer-belt and one of the magnets, the pole-pieces ofthe upper magnet being tapered and extending along said discharging-belt.

6. In a magnetic ore-separator, the combination of a conveyer-belt adapted to convey the material tobe treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the conveyer -belt, the upper magnet having the stronger magnetic field, and a dischargingbelt passing over and beyond and at an angle with the conveyer-belt, said discharging-belt being interposed between the conveyer-belt and one of the magnets, the pole-pieces of the upper magnet extending along said discharging-belt.

7. In a magnetic ore-separator, the combination of two electromagnets of general U shape, each provided with a magnetizing coil or bobbin, and arranged so that their cores and pole-pieces will form a magnetic circuit, interrupted by two air-gaps, one of magnetic materials, the combination with a mechanical conveyer, and a superposed crossconveyer, of a magnetic system having one pole above the conveyers and another pole below the conveyers, the magnetic field of said system increasing in strength upwardly and being substantially vertical.

9. In the magnetic system of a magnetic separator, and in combination with means forcarrying the material to the magnetic field, an opposed pair of magnetic poles placed to form a vertical magnetic field which increases rapidly in strength upward, and acts substantially vertically.

10. In a magnetic ore-separator, the combination of a conveyerbelt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the conveyer-belt, and a discharging-belt passing over and beyond and at an angle with the eonveyer-belt, said discharging-belt being interposed between the'oonveyer-belt and one of the magnets, and a belt interposed between the eonveyer-belt and the other magnet and extending parallel with the discharging-belt.

11. In a magnetic ore-separator, the com- I bination of a oonveyer-belt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the eonveyer-belt, and a discharging-belt passing over and beyond and at an angle with the eonveyerbelt, said discharging-belt being interposed between the conveyer-belt and the magnet in closer proximity to the eonveyer-belt, and a belt interposed between the conveyer-belt and the other magnet and extending parallel with the discharging-belt.

12. In a magnetic ore-separator, the combination of a eonveyer-belt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the eonveyer-belt, and a disoharging-belt passing over and beyond and at an angle with the conveyor-belt, said discharging-belt being interposed between the conveyer-belt and one of the magnets, and a belt interposed between the oonveyer-belt and the other magnet and extending parallel with the discharging-belt, the pole-pieces of said magnets extending along said interposed belt and discharging-belt.

13. In a magnetic oreseparator, the combination of a eonveyer-belt adapted to convey the material to be treated, of magnets above and below said belt, the pole-pieces of opposite magnets being in proximity to the eonveyer-belt, a discharging-belt assing over and beyond and at an angle with the eonveyer-belt, said discharging-belt being interposed between the conveyer-belt and one of the magnets, and a belt interposed between the conveyer-belt and the other magnet and extending parallel with the discharging-belt, the pole-pieces of said magnets extending along said interposed belt and discharging-belt.

Signed by me at Philadelphia this 14th day of February, 1898.

LEVIS G. ROWVAND.

Witnesses:

HORACE M. GooDwIN, MINNIE F. ELLIS. 

